which stack are u trying to attach it to, AFAIK a filter driver that
sits above or below a function driver.
A developer can install their filter driver to filter I/O activity for
all Disk/CD/DVD devices (e.g. class filter), or on a per device basis
(e.g. device filter). The driver can be specified as a lower filter or
upper filter. IRPs (I/O Request Packets) are sent down the I/O stack,
and processed by these filter drivers, in the following order:
* Upper class filters
* Upper device filters
* Function driver
* Lower class filters
* Lower device filters
* Bus driver/filters
Filter drivers are often used to extend or alter the normal
capabilities of Microsoft’s CD/DVD device driver (function driver).
For further information on this topic, I recommend you research
Microsoft’s Windows Driver Model (WDM).
On 5 Aug 2005 07:28:59 -0000, D M wrote:
>
>
>
> hi gurus,
>
> I am trying to attach a filterdriver to a stack. as far as i know, a lower
> filter attaches itself below the device, right?
>
> How do I make that happen? just editing the registry key and adding a
> “LowerFilters” is enough? or do i need to make changes into the driver code
> also? It is a WDM driver.
>
> thanks
>
>
>
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